Double-flange trap and sink.



. No. 873,120. PATENTED DEC. 10, 1907.

G. B. DUNSTAN.

DOUBLE PLA'NGE TRAP AND SINK. APPLICATION FILED AUG. 10, 1906.

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GEORGE EDWIN DUNSTAN, OF LORATN, OHIOr OUBLE-FLANGE TRAP AND SINK:

" flange of the trap or sink and passing down through the floor and disfiguring the ceiling and doing other damage.

The principal object of the invention is to provide a simple and inexpensive addition to l the casing of a trap in the nature of a peripheral flange just below the surface flange of the casing and arranged to be embedded in the cement or asphalt of the floor, so as to dam back the molsture or water and prevent it from passing through the floor,

With this ob'ect in view, and others, as

will appear as 't e nature of the invention is better understood, the invention comprises various novel features of construction and arrangement of parts, which will be more fully described hereinafter and set forth with particularity in the claims a pended hereto.

In the accompanying rawing, which illustrates certain embodiments ofthe invention, Figure 1 is a central vertical section of a stench trap having a flange constructed in accordance with the invention. Fig. 2'is a plan view thereof; Fig. 3 is a plan view of a slop sink showing the flange applied to the Specificationof Letters Patent.

Application filed August 10;].906- Serial No. 330052.

Patented Dec. 10, 1907.

same. Fig. 4 is a central vertical section:v

thereof.

Corresponding parts in the several figures are indicated throughout by similar characters of reference.

Referring to the drawing, 1 designates the body of a stench trap of the character disclosed in theU. Sv Patent to George Dunstan, 543,617. The tra' is. of the surface type having a horizonta peripheral flange 2 at the upper end of the casing that is adapted to be embedded flush with the floor surface. As to the internal construction of the trap, the present invention has no bearing, but relates particularly to a peripheral flange 3 extending around the casing at a point a few inches below the surface flan e 2. This flange is adapted to be embe ded in the cement, asphalt, or other material 5, of

flan es.

which the floor is constructed, and is prcferably cast integral with the casing, so as to avoid the presence of a joint. Along the outer edge'the flange 3 is flared upwardlyso as to form an upturned rim 4, in order that the flange 3 may serve as a trough or basin. The flange, measured in a radial direction, extends somewhat beyond the periphery of the surface flange 2, so that the water or moisture that passes over the periphery of the flange 2 into the floor 5 will be caught in or dammed up by the basin-like flange 3,

and thus be prevented from passing down along the trap and disfiguring the ceiling and causing other damage, a slight crevice being usually left between the trap and the floor by reason of the shrinkage. of the cement in setting, and the liquid that would otherwise leak through or around the casing to the ceiling below is intercepted, in the present instance, by the basin or'trough which is larger than, and extends outwardly beyond, the upper flange, Another reason for making the lower flange larger than the top one is to enable the workman to throw cement or asphalt into the lower flange and thus make a better job, the rim of the supplemental or lower flange being upturned at a point outside of or beyond the periphery of the upper cement may be introduced and tamped,

causing it to be very closely packed around the trap to prevent moisture or surface water entering between it and the surrounding floor. The upturned rim of the lower flange in this case against the'lower strata of cement crowding away from the tra as the cement above it-is tamped in p ace. The flange 3 preferably follows the outline of the flange 2, and hence is circular when applied to surface traps of the character s own in Fig. 1 or square when used in connection with slop sinks, such as that shown in Figs. 3 and 4. In some cases, however, traps and sinks are round and have square In such instance, the lower flanges would also be square.

The construction of the slop sink 6 is substantially the same as those in common use, except that the same. is cast with the pesink, it is obvious that itmay be used with other forms which possess the objectionable features that this invention is designed to overcome,

I have described the principle of operation of the invention, together with the apparatus which I now consider to be the best embodiment thereof, but I desire to have it understood that the apparatus shown is merely. illustrative, and that various changes may be made, when desired, as are within the scope of the invention.

What is claimed is 1. A device of the character described comprising a casing having a peripheral I flange surrounding its upper edge, the upper surface of the flange being flush with the upper edge of the casing, and a sup leInental imperforate flange surrounding t e casin immediately below the upper flange and having a peripheral rim' turned upwardly and oilset outwardly beyond the periphery 'by the upper flange. 2. A trap or the like embodying a casing having an upper peripheral flange thereon, and a supplemental imperforate flange surrounding the casing below the upper flange and projecting outwardly beyond the periphery thereof and provided with an upturned surrounding rim forming a cement receiving pocket between the flan es with a contracted opening through w rich the cement may be introduced and tamped, the upturned peripheral rim constituting a shoulder to prevent the cement crowding away from the casing, and also forming an annular liquid receptacle surrounding it and serving to intercept liquid leaking between the outside of the casing and the surrounding floor. I

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the'presence of two witnesses.

GEORGE EDWIN DUNSTAN.

Witnesses: 4

'C. E. VAN DEUsEN, a V CHAS. A. DAGER. 

